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[PMID]:29176833
[Au] Autor:Lin YC; Chen CP
[Ad] Endereço:Department of Public Health, College of Public Health, China Medical University, Taichung, Taiwan.
[Ti] Título:Characterization of small-to-medium head-and-face dimensions for developing respirator fit test panels and evaluating fit of filtering facepiece respirators with different faceseal design.
[So] Source:PLoS One;12(11):e0188638, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:A respirator fit test panel (RFTP) with facial size distribution representative of intended users is essential to the evaluation of respirator fit for new models of respirators. In this study an anthropometric survey was conducted among youths representing respirator users in mid-Taiwan to characterize head-and-face dimensions key to RFTPs for application to small-to-medium facial features. The participants were fit-tested for three N95 masks of different facepiece design and the results compared to facial size distribution specified in the RFTPs of bivariate and principal component analysis design developed in this study to realize the influence of facial characteristics to respirator fit in relation to facepiece design. Nineteen dimensions were measured for 206 participants. In fit testing the qualitative fit test (QLFT) procedures prescribed by the U.S. Occupational Safety and Health Administration were adopted. As the results show, the bizygomatic breadth of the male and female participants were 90.1 and 90.8% of their counterparts reported for the U.S. youths (P < 0.001), respectively. Compared to the bivariate distribution, the PCA design better accommodated variation in facial contours among different respirator user groups or populations, with the RFTPs reported in this study and from literature consistently covering over 92% of the participants. Overall, the facial fit of filtering facepieces increased with increasing facial dimensions. The total percentages of the tests wherein the final maneuver being completed was "Moving head up-and-down", "Talking" or "Bending over" in bivariate and PCA RFTPs were 13.3-61.9% and 22.9-52.8%, respectively. The respirators with a three-panel flat fold structured in the facepiece provided greater fit, particularly when the users moved heads. When the facial size distribution in a bivariate RFTP did not sufficiently represent petite facial size, the fit testing was inclined to overestimate the general fit, thus for small-to-medium facial dimensions a distinct RFTP should be considered.
[Mh] Termos MeSH primário: Face/anatomia & histologia
Cabeça/anatomia & histologia
Dispositivos de Proteção Respiratória
[Mh] Termos MeSH secundário: Adulto
Algoritmos
Antropometria
Desenho de Equipamento
Feminino
Seres Humanos
Masculino
Análise de Componente Principal
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171219
[Lr] Data última revisão:
171219
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171128
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0188638


  2 / 1844 MEDLINE  
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[PMID]:29049235
[Au] Autor:Shin H; Oh J; Lim TH; Kang H; Song Y; Lee S
[Ad] Endereço:aDepartment of Emergency Medicine, College of Medicine bConvergence Technology Center for Disaster Preparedness, Hanyang University cDepartment of Emergency Medicine, College of Medicine, Hallym University, Seoul, Republic of Korea.
[Ti] Título:Comparing the protective performances of 3 types of N95 filtering facepiece respirators during chest compressions: A randomized simulation study.
[So] Source:Medicine (Baltimore);96(42):e8308, 2017 Oct.
[Is] ISSN:1536-5964
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:OBJECTIVE: Healthcare providers in emergency departments should wear respirators for infection protection. However, the wearer's vigorous movements during cardiopulmonary resuscitation may affect the protective performance of the respirator. Herein, we aimed to assess the effects of chest compressions (CCs) on the protective performance of respirators. METHODS: This crossover study evaluated 30 healthcare providers from 1 emergency department who performed CC with real-time feedback. The first, second, and third groups started with a cup-type, fold-type, and valve-type respirator, respectively, after which the respirators were randomized for each group. The fit factors were measured using a quantitative fit testing device before and during the CC in each experiment. The protection rate was defined as the proportion of respirators achieving a fit factor ≥100. RESULTS: The fold-type respirator had a significantly greater protection rate at baseline (100.0% ±â€Š0.0%) compared to the cup-type (73.6% ±â€Š39.6%, P = .003) and valve-type respirators (87.5% ±â€Š30.3%, P = .012). During the CC, the fit factor values significantly decreased for the cup-type (44.9% ±â€Š42.8%, P < .001) and valve-type respirators (59.5% ±â€Š41.7%, P = .002), but not for the fold-type respirator (93.2% ±â€Š21.7%, P = .095). CONCLUSIONS: The protective performances of respirators may be influenced by CC. Healthcare providers should identify the respirator that provides the best fit for their intended tasks.
[Mh] Termos MeSH primário: Reanimação Cardiopulmonar/efeitos adversos
Desenho de Equipamento
Pessoal de Saúde
Exposição Ocupacional/prevenção & controle
Dispositivos de Proteção Respiratória
[Mh] Termos MeSH secundário: Adulto
Reanimação Cardiopulmonar/métodos
Estudos Cross-Over
Feminino
Seres Humanos
Masculino
Meia-Idade
Estudos Prospectivos
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171122
[Lr] Data última revisão:
171122
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:171020
[St] Status:MEDLINE
[do] DOI:10.1097/MD.0000000000008308


  3 / 1844 MEDLINE  
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[PMID]:28673259
[Au] Autor:Mukerji S; MacIntyre CR; Seale H; Wang Q; Yang P; Wang X; Newall AT
[Ad] Endereço:School of Public Health and Community Medicine, The University of New South Wales, Sydney, NSW, 2052, Australia. s.mukerji@unsw.edu.au.
[Ti] Título:Cost-effectiveness analysis of N95 respirators and medical masks to protect healthcare workers in China from respiratory infections.
[So] Source:BMC Infect Dis;17(1):464, 2017 Jul 03.
[Is] ISSN:1471-2334
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: There are substantial differences between the costs of medical masks and N95 respirators. Cost-effectiveness analysis is required to assist decision-makers evaluating alternative healthcare worker (HCW) mask/respirator strategies. This study aims to compare the cost-effectiveness of N95 respirators and medical masks for protecting HCWs in Beijing, China. METHODS: We developed a cost-effectiveness analysis model utilising efficacy and resource use data from two cluster randomised clinical trials assessing various mask/respirator strategies conducted in HCWs in Level 2 and 3 Beijing hospitals for the 2008-09 and 2009-10 influenza seasons. The main outcome measure was the incremental cost-effectiveness ratio (ICER) per clinical respiratory illness (CRI) case prevented. We used a societal perspective which included intervention costs, the healthcare costs of CRI in HCWs and absenteeism costs. RESULTS: The incremental cost to prevent a CRI case with continuous use of N95 respirators when compared to medical masks ranged from US $490-$1230 (approx. 3000-7600 RMB). One-way sensitivity analysis indicated that the CRI attack rate and intervention effectiveness had the greatest impact on cost-effectiveness. CONCLUSIONS: The determination of cost-effectiveness for mask/respirator strategies will depend on the willingness to pay to prevent a CRI case in a HCW, which will vary between countries. In the case of a highly pathogenic pandemic, respirator use in HCWs would likely be a cost-effective intervention.
[Mh] Termos MeSH primário: Influenza Humana/prevenção & controle
Máscaras/economia
Dispositivos de Proteção Respiratória/economia
Infecções Respiratórias/prevenção & controle
Ventiladores Mecânicos/economia
[Mh] Termos MeSH secundário: China
Análise Custo-Benefício
Pessoal de Saúde
Seres Humanos
Influenza Humana/economia
Máscaras/utilização
Modelos Econômicos
Pandemias
Ensaios Clínicos Controlados Aleatórios como Assunto
Infecções Respiratórias/economia
Ventiladores Mecânicos/utilização
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171002
[Lr] Data última revisão:
171002
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170705
[St] Status:MEDLINE
[do] DOI:10.1186/s12879-017-2564-9


  4 / 1844 MEDLINE  
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[PMID]:28580847
[Au] Autor:Cai M; Shen S; Li H
[Ad] Endereço:a School of Power and Mechanical Engineering , Wuhan University , Wuhan , China.
[Ti] Título:The effect of facial expressions on respirators contact pressures.
[So] Source:Comput Methods Biomech Biomed Engin;20(10):1122-1131, 2017 Aug.
[Is] ISSN:1476-8259
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:This study investigated the effect of four typical facial expressions (calmness, happiness, sadness and surprise) on contact characteristics between an N95 filtering facepiece respirator and a headform. The respirator model comprised two layers (an inner layer and an outer layer) and a nose clip. The headform model was comprised of a skin layer, a fatty tissue layer embedded with eight muscles, and a skull layer. Four typical facial expressions were generated by the coordinated contraction of four facial muscles. After that, the distribution of the contact pressure on the headform, as well as the contact area, were calculated. Results demonstrated that the nasal clip could help make the respirator move closer to the nose bridge while causing facial discomfort. Moreover, contact areas varied with different facial expressions, and facial expressions significantly altered contact pressures at different key areas, which may result in leakage.
[Mh] Termos MeSH primário: Expressão Facial
Pressão
Dispositivos de Proteção Respiratória
[Mh] Termos MeSH secundário: Fenômenos Biomecânicos
Simulação por Computador
Desenho de Equipamento
Face
Seres Humanos
Masculino
Modelos Teóricos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171113
[Lr] Data última revisão:
171113
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170606
[St] Status:MEDLINE
[do] DOI:10.1080/10255842.2017.1336549


  5 / 1844 MEDLINE  
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[PMID]:28512363
[Au] Autor:Kozlowski E; Mlynski R
[Ad] Endereço:Centralny Instytut Ochrony Pracy - Panstwowy Instytut Badawczy / Central Institute for Labour Protection - National Research Institute, Warszawa, Poland (Zaklad Zagrozen Wibroakustycznych / Department of Vibroacoustic Hazards). emkoz@ciop.pl.
[Ti] Título:[Attenuation of earmuffs used simultaneously with respiratory protective devices].
[Ti] Título:Tlumienie dzwieku nauszników przeciwhalasowych stosowanych jednoczesnie ze sprzetem ochrony ukladu oddechowego..
[So] Source:Med Pr;68(3):349-361, 2017 May 16.
[Is] ISSN:0465-5893
[Cp] País de publicação:Poland
[La] Idioma:pol
[Ab] Resumo:BACKGROUND: In the work environment, apart from the noise, employees may be exposed to other harmful factors. Therefore, they wear hearing protectors and other personal protective equipment. The aim of the study was to determine whether simultaneous use of earmuffs and respiratory protective devices affects the attenuation of earmuffs. MATERIAL AND METHODS: The study was conducted in laboratory conditions using the subjective REAT (Real Ear Attenuation at Threshold) and objective MIRE (Microphone in Real Ear) methods. The REAT method was used to measure sound attenuation of earmuffs, while MIRE was used to determine changes in attenuation of earmuffs due to the use of other personal protective equipment. RESULTS: The study showed reduction in attenuation of earmuffs due to the use of a full face mask up to 20 dB. Using a full face mask causes that attenuation of earmuffs in the low frequency range is close to zero. Reduction in attenuation due to the use of half masks for complete with particle filters (half masks) is 3-15 dB. Simultaneous use of earmuffs and filtering half masks makes small changes in attenuation not exceeding 3 dB. CONCLUSIONS: The study showed that full face masks give the greatest reduction in attenuation of earmuffs. On the other hand, the least reduction is observed in the case of filtering half masks. There is a significant difference between the reduction in attenuation of earmuffs worn with half masks for complete with particle filters because they may be equipped with different kind of the head strap. Med Pr 2017;68(3):349-361.
[Mh] Termos MeSH primário: Dispositivos de Proteção das Orelhas
Eficiência
Ruído Ocupacional/prevenção & controle
Dispositivos de Proteção Respiratória
Local de Trabalho
[Mh] Termos MeSH secundário: Adulto
Feminino
Seres Humanos
Masculino
Meia-Idade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170922
[Lr] Data última revisão:
170922
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170518
[St] Status:MEDLINE


  6 / 1844 MEDLINE  
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[PMID]:28418743
[Au] Autor:Chen YJ; Chiang PJ; Cheng YH; Huang CW; Kao HY; Chang CK; Huang HM; Liu PY; Wang JH; Chih YC; Chou SM; Yang CH; Chen CH
[Ti] Título:Stockpile Model of Personal Protective Equipment in Taiwan.
[So] Source:Health Secur;15(2):170-174, 2017 Mar/Apr.
[Is] ISSN:2326-5108
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The Taiwan Centers for Disease Control (Taiwan CDC) has established a 3-tier personal protective equipment (PPE) stockpiling framework that could maintain a minimum stockpile for the surge demand of PPE in the early stage of a pandemic. However, PPE stockpiling efforts must contend with increasing storage fees and expiration problems. In 2011, the Taiwan CDC initiated a stockpile replacement model in order to optimize the PPE stockpiling efficiency, ensure a minimum stockpile, use the government's limited funds more effectively, and achieve the goal of sustainable management. This stockpile replacement model employs a first-in-first-out principle in which the oldest stock in the central government stockpile is regularly replaced and replenished with the same amount of new and qualified products, ensuring the availability and maintenance of the minimum stockpiles. In addition, a joint electronic procurement platform has been established for merchandising the replaced PPE to local health authorities and medical and other institutions for their routine or epidemic use. In this article, we describe the PPE stockpile model in Taiwan, including the 3-tier stockpiling framework, the operational model, the components of the replacement system, implementation outcomes, epidemic supports, and the challenges and prospects of this model.
[Mh] Termos MeSH primário: Modelos Teóricos
Equipamento de Proteção Individual/provisão & distribuição
Estoque Estratégico/economia
[Mh] Termos MeSH secundário: Seres Humanos
Influenza Humana/epidemiologia
Influenza Humana/prevenção & controle
Influenza Humana/transmissão
Pandemias/economia
Equipamento de Proteção Individual/utilização
Dispositivos de Proteção Respiratória
Taiwan
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171031
[Lr] Data última revisão:
171031
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170419
[St] Status:MEDLINE
[do] DOI:10.1089/hs.2016.0103


  7 / 1844 MEDLINE  
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[PMID]:28397938
[Au] Autor:Al-Sehaibany FS
[Ad] Endereço:Division of Pediatric Dentistry, Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia. E-mail. falsehaibany@ksu.edu.sa.
[Ti] Título:Middle East respiratory syndrome in children. Dental considerations.
[So] Source:Saudi Med J;38(4):339-343, 2017 Apr.
[Is] ISSN:0379-5284
[Cp] País de publicação:Saudi Arabia
[La] Idioma:eng
[Ab] Resumo:As of January 2016, 1,633 laboratory-confirmed cases of Middle East Respiratory Syndrome Coronavirus (MERS-CoV) infection and 587 MERS-related deaths have been reported by the World Health Organization globally. Middle East Respiratory Syndrome Coronavirus  may occur sporadically in communities or may be transmitted within families or hospitals. The number of confirmed MERS-CoV cases among healthcare workers has been increasing. Middle East Respiratory Syndrome Coronavirus may also spread through aerosols generated during various dental treatments, resulting in transmission between patients and dentists. As MERS-CoV cases have also been reported among children, pediatric dentists are at risk of MERS-CoV infection. This review discusses MERS-CoV infection in children and healthcare workers, especially pediatric dentists, and considerations pertaining to pediatric dentistry. Although no cases of MERS-CoV transmission between a patient and a dentist have yet been reported, the risk of MERS-CoV transmission from an infected patient may be high due to the unique work environment of dentists (aerosol generation).
[Mh] Termos MeSH primário: Infecções por Coronavirus/prevenção & controle
Infecções por Coronavirus/transmissão
Infecção Hospitalar/prevenção & controle
Infecção Hospitalar/transmissão
Assistência Odontológica para Crianças/efeitos adversos
Transmissão de Doença Infecciosa do Paciente para o Profissional/prevenção & controle
[Mh] Termos MeSH secundário: Aerossóis
Criança
Odontólogos
Hospitais
Seres Humanos
Dispositivos de Proteção Respiratória/utilização
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Aerosols)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171103
[Lr] Data última revisão:
171103
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170412
[St] Status:MEDLINE
[do] DOI:10.15537/smj.2017.4.15777


  8 / 1844 MEDLINE  
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[PMID]:28154360
[Au] Autor:Onishi K
[Ad] Endereço:Center of Birth Cohort Studies, Interdisciplinary Graduate School of Medicine, University of Yamanashi.
[Ti] Título:Health Impact Assessment of Asian Dust/Cross-border Air Pollutant and Necessary Preventive Measure.
[So] Source:Nihon Eiseigaku Zasshi;72(1):43-48, 2017.
[Is] ISSN:1882-6482
[Cp] País de publicação:Japan
[La] Idioma:jpn
[Ab] Resumo:The health effects of Asian dust (mineral dust) originating from dry lands such as the Gobi Desert and Taklamakan Desert have recently been a concern. In addition to Asian dust, transboundary airborne microparticles that reach Japan include various types of aerosol, such as artificial air pollutants and smoke from combustion. They originate from densely populated areas and are transported along the same route as Asian dust. We analyzed environmental factors and subjective symptoms involving the respiratory organ, nose, eyes, and skin using a conventional equation for estimation, and found that symptoms with a significant risk of worsening varied according to the type of pollutants reaching Japan. We also analyzed the synergistic effects of Asian dust and pollens on nasal symptoms using a two-pollutant model. The odds ratio for symptoms at the time of arrival of a high concentration of Asian dust was 1.37 (95% confidence interval: 1.19-1.58), but the odds ratio adjusted for pollens was 1.18 (95% confidence interval: 1.04-1.34). Although the influence on nasal symptoms overlapped somewhat between Asian dust and pollens, that of Asian dust remained significant. Regarding preventive measures against symptoms, we examined the rate of particle leakage into masks. We found that it is important to wear a mask that fits an individual's facial features and has no gap between the face and the mask. In addition, we report our attempt to construct models for predicting aerosol arrival and forecasting health to establish preventive measures against aerosols.
[Mh] Termos MeSH primário: Poluentes Atmosféricos/efeitos adversos
Poluição do Ar/efeitos adversos
Poluição do Ar/prevenção & controle
Clima Desértico
Poeira
Indicadores Básicos de Saúde
Rinite/etiologia
Rinite/prevenção & controle
[Mh] Termos MeSH secundário: Aerossóis/efeitos adversos
Aerossóis/análise
Poluição do Ar/análise
Ásia
Seres Humanos
Japão
Máscaras
Pólen/efeitos adversos
Dispositivos de Proteção Respiratória
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Aerosols); 0 (Air Pollutants); 0 (Dust)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:171013
[Lr] Data última revisão:
171013
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170204
[St] Status:MEDLINE
[do] DOI:10.1265/jjh.72.43


  9 / 1844 MEDLINE  
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[PMID]:28125764
[Au] Autor:Gaskins AJ; Chavarro JE; Rich-Edwards JW; Missmer SA; Laden F; Henn SA; Lawson CC
[Ad] Endereço:Harvard TH Chan School of Public Health, Building II 3rd Floor, 655 Huntington Avenue, Boston, MA 02115, USA. ajg219@mail.harvard.edu.
[Ti] Título:Occupational use of high-level disinfectants and fecundity among nurses.
[So] Source:Scand J Work Environ Health;43(2):171-180, 2017 Mar 01.
[Is] ISSN:1795-990X
[Cp] País de publicação:Finland
[La] Idioma:eng
[Ab] Resumo:Objective This study aimed to examine the relationship between occupational use of high-level disinfectants (HLD) and fecundity among female nurses. Methods Women currently employed outside the home and trying to get pregnant (N=1739) in the Nurses' Health Study 3 cohort (2010-2014) were included in this analysis. Occupational exposure to HLD used to disinfect medical instruments and use of protective equipment (PE) was self-reported on the baseline questionnaire. Every six months thereafter women reported the duration of their ongoing pregnancy attempt. Multivariable accelerated failure time models were used to estimate time ratios (TR) and 95% confidence intervals (95% CI). Results Nurses exposed to HLD prior to and at baseline had a 26% (95% CI 8-47%) and 12% (95% CI -2-28%) longer median duration of pregnancy attempt compared to nurses who were never exposed. Among nurses exposed at baseline to HLD, use of PE attenuated associations with fecundity impairments. Specifically, women using 0, 1, and ≥2 types of PE had 18% (95% CI -7-49%), 16% (95% -3-39%), and 0% (95% -22-28%) longer median durations of pregnancy attempt compared to women who were never exposed. While the use of PE varied greatly by type (9% for respiratory protection to 69% for protective gloves), use of each PE appeared to attenuate the associations of HLD exposure with reduced fecundity. Conclusion Occupational use of HLD is associated with reduced fecundity among nurses, but use of PE appears to attenuate this risk.
[Mh] Termos MeSH primário: Desinfetantes/efeitos adversos
Fertilidade
Recursos Humanos de Enfermagem no Hospital
Exposição Ocupacional/efeitos adversos
[Mh] Termos MeSH secundário: Adulto
Emprego
Estudos Epidemiológicos
Feminino
Seres Humanos
Exposição Ocupacional/prevenção & controle
Gravidez
Roupa de Proteção/utilização
Dispositivos de Proteção Respiratória/utilização
Inquéritos e Questionários
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Disinfectants)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171016
[Lr] Data última revisão:
171016
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170127
[St] Status:MEDLINE


  10 / 1844 MEDLINE  
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[PMID]:28124138
[Au] Autor:Lawniczek-Walczyk A; Golofit-Szymczak M; Cyprowski M; Stobnicka A; Górny RL
[Ad] Endereço:Biohazard Laboratory, Department of Chemical, Aerosol and Biological Hazards, Central Institute for Labour Protection-National Research Institute, Czerniakowska 16 Street, 00-701, Warsaw, Poland. anlaw@ciop.pl.
[Ti] Título:Monitoring of bacterial pathogens at workplaces in power plant using biochemical and molecular methods.
[So] Source:Int Arch Occup Environ Health;90(3):285-295, 2017 Apr.
[Is] ISSN:1432-1246
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:PURPOSE: The aim of this study was to characterize the ways of spreading of the most common bacterial species isolated from workers as well as from the air and raw materials at the workplaces in power plant utilizing biomass sources. To monitor microbial transmission and identify the source of contamination in the working environment, a combination of molecular and biochemical methods was applied. METHODS: The study was carried out at workplaces in power plant utilizes biomass as a main fuel source. At each of the studied workplaces, bioaerosol particles were collected on sterile Teflon filters using personal conical inhalable samplers (CIS), and biomass samples (straw pellets and briquettes, corn briquettes, sunflower pellets and wood chips) were directly taken from their storage places. Simultaneously with that, the swab samples from the hands of ten workers and their used respiratory masks (of FFP2 class) were also collected after the work shift to evaluate individual workers' microbial contamination. In all collected samples, total bacterial concentrations were assessed and the most common microbial isolates were identified to the species level using both biochemical (API tests) and molecular polymerase chain reaction (PCR), followed by random amplification of polymorphic DNA (RAPD) typing methods. RESULTS: The mean concentrations of culturable bacteria in the air and in biomass samples at the studied workplaces were high, i.e. 1.2 × 10 cfu/m and 3.8 × 10 cfu/g, respectively. The number of bacteria in the swab and mask samples also reached a high level of 1.4 × 10 cfu/ml and 1.9 × 10 cfu/cm , respectively. Among the most frequently isolated microorganisms from all types of samples were Gram-positive bacteria of the genus Bacillus and Staphylococcus xylosus. 37 bacterial strains belonging to the genus Bacillus (B. licheniformis 8, B. pumilus 15 and B. subtilis 4) and Staphylococcus (10) were genotyped by the RAPD-PCR method. Based on RAPD-PCR analyses, the genomic similarity among 19 Bacillus strains isolated from biomass, air, protective mask and hand samples as well as 6 S. xylosus strains isolated from air, mask and hand samples exceeded 80%. CONCLUSION: This study demonstrated that biomass is the primary source of bacteria at power plant workplaces. These results also revealed that biomass-associated bacteria can be easily transferred to workers' hands and mask during their routine activities. To improve health protection at the workplaces, adequate training courses on hand hygiene and how to use and remove respiratory masks correctly for workers should be introduced as a key element of the prevention strategy. From the occupational point of view, the PCR-based methods seem to be an efficient tool for a fast and precise typing of bacterial strains isolated from different sources in the occupational environment. Such methods may help to implement appropriate prophylactic procedures and minimize transmission of infectious agents at workplaces.
[Mh] Termos MeSH primário: Poluição do Ar em Ambientes Fechados/análise
Bactérias/isolamento & purificação
Exposição Ocupacional/análise
Centrais Elétricas/estatística & dados numéricos
[Mh] Termos MeSH secundário: Microbiologia do Ar
Bactérias/classificação
Biomassa
Contagem de Colônia Microbiana
Monitoramento Ambiental/métodos
Mãos/microbiologia
Seres Humanos
Polônia
Reação em Cadeia da Polimerase
Técnica de Amplificação ao Acaso de DNA Polimórfico
Dispositivos de Proteção Respiratória/microbiologia
Local de Trabalho/estatística & dados numéricos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170906
[Lr] Data última revisão:
170906
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170127
[St] Status:MEDLINE
[do] DOI:10.1007/s00420-017-1197-z



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